1、AN AM E R ICAN NAT IO NAL STANDARDASME B16.49-2017(Revision of ASME B16.49-2012)Factory-Made,Wrought Steel,Buttwelding Induction Bends for Transportation and Distribution SystemsASME B16.49-2017(Revision of ASME B16.49-2012)Factory-Made,WroughtSteel,ButtweldingInduction Bends forTransportation andDi
2、stribution SystemsAN AMERICAN NATIONAL STANDARDDate of Issuance:December 29,2017The next edition of this Standard is scheduled for publication in 2022.ASME issues written replies to inquiries concerning interpretations of technical aspects of this Standard.Periodically certainactionsoftheASMEB16Comm
3、itteemaybepublishedasCases.CasesandinterpretationsarepublishedontheASMEWebsiteunder the Committee Pages at http:/cstools.asme.org/as they are issued.Errata to codes and standards may be posted on the ASME Web site under the Committee Pages to provide corrections toincorrectlypublisheditems,ortocorre
4、cttypographicalorgrammaticalerrorsincodesandstandards.Sucherratashallbeusedon the date posted.TheCommitteePagescanbefoundathttp:/cstools.asme.org/.Thereisanoptionavailabletoautomaticallyreceiveane-mailnotification when errata are posted to a particular code or standard.This option can be found on th
5、e appropriate CommitteePage after selecting“Errata”in the“Publication Information”section.ASME is the registered trademark of The American Society of Mechanical Engineers.ThiscodeorstandardwasdevelopedunderproceduresaccreditedasmeetingthecriteriaforAmericanNationalStandards.TheStandardsCommitteethat
6、approvedthecodeorstandardwasbalancedtoassurethatindividualsfromcompetentandconcernedinterestshavehadanopportunityto participate.The proposed codeorstandardwasmadeavailable forpublic reviewandcommentthatprovidesanopportunityfor additional public input from industry,academia,regulatory agencies,and th
7、e public-at-large.ASME does not“approve,”“rate,”or“endorse”any item,construction,proprietary device,or activity.ASME does not take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in thisdocument,anddoesnotundertaketoinsureanyoneutilizing
8、astandardagainstliabilityforinfringementofanyapplicableletterspatent,norassumeanysuchliability.Usersofacodeorstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtherisk of infringement of such rights,is entirely their own responsibility.Participation by federal agency r
9、epresentative(s)or person(s)affiliated with industry is not to be interpreted as government or industryendorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the established ASME proceduresand policies,which preclude
10、s the issuance of interpretations by individuals.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersTwo Park Avenue,New York,NY 10016-5990Copyright 201
11、7 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword.ivCommittee Roster.vCorrespondence With the B16 Committee.viSummary of Changes.viiiList of Changes in Record Number Order.ix1Scope and Definitions.12Pressure Ratings.23Size.24Marking.25Material.36Mat
12、erial for Bends Containing Welds.47Chemical Composition.58Material Properties.59Heat Treatment.510Qualification Bend.611Test Requirements.712Dimensional Requirements.813Inspection of Production Bends.914Certification.9SR15Supplementary Requirements.9Mandatory AppendixIReferences.12Nonmandatory Appen
13、dicesAQuality System Program.13BInduction Bend Data Sheet.14Figures1Bend Dimensional Terms.32Test Specimen Locations and Orientations Longitudinal Seam.63Test Specimen Locations and Orientations Helical Seam.74Measurement of Bend Angle and Out-of-Squareness.10Tables1Tensile Properties.42Maximum Limi
14、ts of Chemical Elements That May Be Used.43Limits on Essential Variables.7iiiFOREWORDIn 1993,members of the ASME B31.8 Code for Pressure Piping,Gas Transmission and Distribution Piping SystemsCommittee approached the B16 Committee to develop a standard that covers pipeline bends produced by the indu
15、ctionbending process.SubcommitteeFreviewedtherequestandidentifiedthatnocurrentspecificationcoveredthisproducttothesatisfac-tion of the users.It was also determined that this Standard would need to be more performance-based than most otherB16 standards,which are normally product standards with set di
16、mensional requirements.At the 1994 meeting of Subcommittee F,the project to develop a standard was accepted.Through the cooperation ofproducersandusersfamiliarwiththeprocess,andwithapprovalbytheStandardsCommitteeandASME,ASMEB16.49-2000 received approval as an American National Standard on April 25,2000.In2005,theCommitteeundertookageneralreviewofthisdocument.BasedontheusageofthisStandardoverthelast5years,anumberofrevisions,clarifications,andadditionsweredeterminedtobeneededtomakethedocumentmoreu
